Basecamp Synthetic Sleeping Bag - BT3

Basecamp Synthetic Sleeping Bag – BT3

The Basecamp has been designed for those of us who find a mummy bag restrictive, and who would prefer to enjoy a little more comfort and stretch out space while escaping outdoors.

The Basecamp offers a contoured rectangular design to accommodate sleepers who like to stretch out full length, or those who like to curl up into a ball. It is also a fantastic solution for restless sleepers who can now move freely within their bag.

The Basecamp is available in three 750+ loft ULTRADRY Down™ models to keep packed size small (BcI, BcII and BcIII), or two THERMOLITE® models where packed size isn’t a priority but a more affordable sleeping bag is desirable (Bt3 and Bt4).

If you are looking for the ultimate in camping comfort, the Basecamp has also been designed to work with all 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 elasticised strap underneath the hood.

No matter which way the weather turns, the Basecamp bag can be modified to suit. Zip yourself in and pull the internal drawcords tight to combat the cold. If the weather takes a turn towards summer, then you can vent the feet, or unzip one or both sides to keep yourself cool and comfortable. The Basecamp is so much more than just a sleeping bag; the dual zipper allows it to transform from a substantial and sumptuous bag into a svelte summer quilt. The bottom of the quilt holds its shape as a roomy footbox, and a series of attachment loops even lets you secure your quilt onto your mat to ensure maximum warmth.

    “BT3 synthetic bag convertible versatile “

    This product is currently out of stock and unavailable.

      • THERMOLITE® insulation
      • Spacious rectangular shape with pillow attachment system under hood to hold Aero Ultralight large pillow in place (not included)
      • Two position sleeping mat attachment system
      • Differential cut shell
      • Zip draft tube with anti-snag and neck draft tube, cushioned internal hood drawcord
      • 2 way YKK #5 zip on each side of the bag, plus separate foot zip
      • Includes strong 70D Nylon compression bag and storage cell/laundry bag


    Size variation
    Volume Compressed
    Recommended User Height
    Width (shoulders)
    11.6 L
    ø194 CM
    1654 G
    ø208 CM
    1894 G


    THERMOLITE® insulation

    THERMOLITE® insulation

    THERMOLITE® insulation provides lightweight warmth for all activites. We use THERMOLITE® insulation in many of our sleep system products in different forms. Sleeping bag liners use THERMOLITE® fibre knitted to create our Reactor THERMOLITE® fabric. Sleeping bags use THERMOLITE® insulation that is designed for superior warmth and exceptional softness. Our insulated Air Sprung Cell™ sleeping mats use THERMOLITE® insulation that is designed with high loft for excellent lightweight warmth with superior durability. The THERMOLITE® insulation lofts up inside the Air Sprung Cells™ to prevent convective heat loss from your warm body to the cold ground.THERMOLITE® is a trademark of INVISTA.
    DryLite™ Microfibre

    DryLite™ Microfibre

    Our DryLite™ Microfibre is a knitted fabric consisting of a blend of 70% Polyester and 30% Polyamide (Nylon) to create a suede like finish where the surface is mechanically processed to produce an extra soft plush feel. It has low bulk to create a compact and lightweight towel that is super absorbant.A Microfiber is a synthetic fiber that measures less than 1 denier, or approximately 1/5 of a human hair. The fibres are then split to create deep channels along its length that give it an enormous surface area, which results is a fabric that can be ten times more absorbent than cotton. Synthetic microfibres can easily be wrung out and dry very quickly. Due to hydrogen bonding, microfibre cloth containing polyamide absorbs and holds more water than other types of fibres.
    2D Permashell

    2D Permashell

    2D PermaShell™ fabric is a high density weave 30 denier Nylon with a DWR finish. This material is highly vapour permeable and down proof by construction.