Thermarest Blockerlite Pump Sack

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A versatile sack for inflating your pad or protecting your gear.

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.

Demo Video:


  • 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.


  • Weight: 0.08kg
  • Width: 14cm
  • Length: 26cm
  • Height: 61cm
  • Packed Dimensions: 15cm x 15cm x 2.5m
  • Top Layer: 20D Rip Nylon
  • Materials: Polyester


SKU 9667
Brand Thermarest
Shipping weight 0.0800kg

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