A note to our community regarding COVID-19
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Update: April 3, 2020

In support of the medical teams fighting to protect our health, we have transitioned our Seattle manufacturing to produce ASTM Level 1 masks for 51 hospitals in the Providence network. The materials are being provided by Kaas Tailored, and we’re humbled to join their efforts to meet the needs of the heroic healthcare community. All masks are allocated to aid in the personal protective equipment (PPE) shortage. We will not be selling masks directly at this time.



To our Cascade Designs family,

As the world changes rapidly around us, we hope that you are safe and able to enjoy the rejuvenation of the outdoors in a responsible way. Our teams at Therm-a-Rest, MSR, SealLine, Platypus and PackTowl are focused on protecting the health and wellbeing of our employees and that of our communities.

In these unprecedented times, our thoughts are with everyone personally affected by the spread of COVID-19 and we are grateful for the medical staff working on the frontlines.

As many of us operate from home, we’re also focused on being here for you. We’re working hard to continue to be your resource for information and inspiration. Our lines are open and our North American website is taking orders.

If you need a dose of adventure stoke, check out our brand blogs and YouTube channels for everything from gear maintenance tips to future trip ideas. Or just say hi to us on social.

As adventurers, we know things can go sideways fast, but it’s how we respond that makes all the difference. Right now, our ability to adapt and truly be there for each other like never before will allow us to navigate this extraordinary challenge and emerge even stronger—together.

From all of us at Cascade Designs, stay safe, stay creatively social, keep looking up.

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BlockerLite™ Pump Sack

A versatile sack for inflating your pad or protecting your gear.
Learn More
$44.95
+FREE SHIPPING
  • In Stock
Find Online
For lightning-fast inflation and water protection, the BlockerLite Pump Sack gives you a versatile and lightweight option for gear storage and mattress inflation. Designed with our friends at SealLine, the pump sack features durable and welded seams. Big enough to hold 20-liters of gear, it’s the perfect size to store extra clothing before inflating a high-volume air pad that features the WingLock or TwinLock valve.
  • Timesaving: Inflates your pad faster than breath inflation. Easily snaps onto Therm-a-Rest valves.
  • SealLine® Protection: Built with ultralight waterproof BlockerLite™ material from our pals at SealLine, this dry sack is extra durable and features welded seams to keep your gear protected.
  • Versatile: Doubles as a lightweight 20-liter dry sack when it’s time to hit the trail.
13228
20 L
Green
5 oz
0.15 kg
5.5 in
14 cm
10 in
26 cm
24 in
61 cm
6 in x 6 in x 1 in
15 cm x 15 cm x 2.5 xm
20D Rip Nylon
NA
Polyester
Made in China
Can I replace the valve on my Therm-a-Rest mattress?
  • Yes. Classic Valve Replacement Kits can be purchased here.
  • WingLock™ Valve Replacement Kits can be purchased here
  • If you’re having issues with your TwinLock™ Valve, our warranty & repair team is here to help. Please visit thermarest.com/warranty for more info.
  • If you’re not sure which valve you have please refer to the graphic below:
  • Valve Type
How do you inflate and deflate sleeping pads with a WingLock™ Valve?
  • Watch this video for step by step instructions on how to use the WingLock™ Valve
  • To Inflate the WingLock™ Valve:
    • Unroll your sleeping pad and open the valve cap by twisting it counter-clockwise.
    • Use a pump sack or breath to inflate your pad. The one-way valve will prevent air from escaping.
    • Continue inflation until the mattress is fully inflated and close the valve by twisting the valve cap clockwise.
  • To Deflate WingLock™ Valve:
    • Open the wings to open the one-way valve.
    • Open the valve cap by twisting counter-clockwise, allowing air to escape
    • Roll the pad toward the valve end, pushing any remaining air from the pad.
Can I replace my old Therm-a-Rest valve with a new WingLock™ Valve or TwinLock™ Valve?
No. WingLock™ or TwinLock™ Valves cannot be installed on products that originally included a Classic Therm-a-Rest Valve. If you’re not sure which valve you have please refer to the graphic below: Valve Type
What makes the WingLock™ Valve different from Classic Therm-a-Rest Valves?
  • Faster Inflation: Larger valve opening and one-way inflation allows three times faster airflow than our classic valve (with a pressurized air supply the Classic Valve flow rate measures to 2.2 standard cubic feet per minute, where the WingLock Valve flow rate measures to 6.5 standard cubic feet per minute, or a 295% difference).
  • One-Way Inflation: Unique design keeps air from escaping during inflation.
  • Deflation “Wings”: When it’s time to break camp, open the valve and twist the wings to deflate your pad twice as fast as our classic valve.
  • Watch this video to learn more
What makes the TwinLock™ Valve different from Classic Therm-a-rest Valves?
For our larger pads, we developed the TwinLock™ Valve which utilizes two one-way valves: a one-way inflation valve and one-way deflation valve that allows for five times faster deflation than our classic valve. Watch this video to learn more.
How do you inflate and deflate sleeping pads with a TwinLock™ Valve?
  • Watch this video for step by step instructions on how to use the TwinLock™ Valve
  • To Inflate TwinLock™ Valve:
    • Unroll your sleeping pad and open the “IN” valve by twisting it counter-clockwise.
    • Use a pump sack or breath to inflate your pad. The one-way “IN” valve will prevent air from escaping.
    • When the mattress is fully inflated and close the valve by twisting the valve cap clockwise.
  • To Deflate TwinLock™ Valve
    • Open the “OUT” valve by twisting counter-clockwise.
    • The one-way “OUT” valve will keep air from flowing back into the pad.
    • Roll the pad toward the valve end, pushing any remaining air from the pad.
How should I store my sleeping pad?
  • Self-Inflating: We recommend storing the mattress unrolled and fully inflated in a dry place with the valve open. This will ensure the foam self-inflates faster when camping. Storage for a prolonged time in a damp space may cause mildew damage which is not covered by our Limited Lifetime Warranty.
  • NeoAir: We recommend leaving the valve open and storing your mattress rolled tight in a stuff sack to protect it from dirt and sharp objects.
What is the best way to clean my sleeping pad?

Regular cleaning will extend the life of your mattress, especially if you sleep in direct contact with its surface.

Do not put your mattress in the washing machine. Cleaning with a hose or in a bathtub is best. Do not forget to close the valve while washing. For general cleaning, a quick scrubbing with Formula 409®, BioClean All-Purpose Cleaner, or other general household cleaner is best.

Watch the video: How to Care for Your Therm-a-Rest® Mattress

For tree sap, spot clean with a cotton rag soaked in rubbing alcohol. This will take some work and sap will likely leave a stain. However, a dusting with talc or baby powder when you are done should eliminate any residual stickiness.

How warm is my sleeping pad and what is the ASTM testing standard?
ASTM F3340-18 is a new testing standard that provides R-value ratings for sleeping pads. While Therm-a-Rest has always used R-value to rate our sleeping pads, this new standardization will allow campers to make “like-for-like” comparisons with our competitors pad. Head to a blog for an in-depth explanation.
What should I do if I think my sleeping pad is losing air?
If you think that your NeoAir or self-inflating sleeping pad are losing air, it’s possible that you have a puncture in your pad. If you want to repair your pad at home, check out this blog post. If you’d like to send your pad to our Seattle repair shop, head over to our warranty page.
How should I inflate my self-inflating pad the first time?
For best performance, inflate your self-inflating pad with air by breath or pump and sack and leave the mattress fully inflated for 2-4 hours before your first use.
How do I inflate my self-inflating pad during winter?
In freezing conditions, avoid breath inflating your self-inflating pad. The moisture from your breath can freeze inside the mattress. The mattress may self-inflate slower in cold weather. Use a pump sack or electric pump if the pad needs additional air.
What is the benefit of stretch knit fabric on my sleeping pad?
For comfort-conscious campers, we use stretch knit fabric for unrivaled support and superior next-to-skin feel. The fabric conforms to your body to provide supple support as you enjoy your nights under the stars.

Limited Lifetime Warranty

Every piece of Therm-a-Rest gear is designed to endure the rigors of your time in the backcountry. We offer a Limited Lifetime Warranty on all products, except electronic devices, which have a 2-year Limited Warranty.

Better Sleep Guarantee

All Therm-a-Rest sleeping bags and quilts are also covered by our Better Sleep Guarantee. When you wake up on a Therm-a-Rest sleeping bag or quilt, we're confident you'll wake up feeling better than ever. If you are not completely satisfied, return it within three months with the original receipt of purchase and we will give you a full refund- no questions asked.

To get your gear repaired, start a warranty claim or to learn more, visit Therm-a-Rest Warranty for more info.

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