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Basecamp Bt4

Our generously sized Basecamp sleeping bag range is also available in a non-down option. Two THERMOLITE® models may be the best choice when affordability is a primary concern, and when easy care is an issue (for instance when camping in desert or sandy riverbank environments). The same spacious, flexible design as the down Bc-versions are insulated with high-quality THERMOLITE® fiber, built into the bags using a unique WAVE LOFT construction. The inner fabric is an artificial silk made of polyester and has to be experienced to be believed. The Bt 4 has an EN rating of 5F / -15C (lower limit)

The Basecamp models have been designed to work with our sleeping mats and Aeros pillows to create a truly comprehensive sleep system. Slide your mat into the small pocket at the foot of the bag and then use the strap and loop set-up to secure the upper section. Then inflate your Aeros Pillow to the perfect pressure before securing it into place with the elastic strap.


Size/Variation
  • Uses Thermolite® synthetic insulation
  • Spacious rectangular shape
  • Pillow attachment system under hood to hold Aeros pillow in place (not included)
  • Two position sleeping mat attachment system
  • Differential cut shell
  • Zip draft tube with anti-snag
  • Neck draft tube
  • Cushioned internal hood draw-cord
  • 2-way YKK #5 zip on each side of the bag
  • Includes lightweight Ultra-Sil compression bag, combined storage cell / laundry bag
  • View full sleeping bag specs
  • Looking for a lighter, more compressible bag with all of the same features. Be sure to check out our Ultra-Dry Down Basecamp. BcI BcII and BcIII