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Criterion Ultralight 350 Unisex -3°C

£245.00 £285.00

The Criterion Ultralight 350 is an extremely lightweight sleeping bag. Designed for backpackers, adventure racers, 2-wheel touring and travelers needing a packable 2 to 3 season bag.

    The BEST Polish GOOSE DOWN with … the BEST Japanese PERTEX fabric
    With a comfort temperature rating of -3°C, this is a bag for the summer. Its weight is a mere 765gms, so it will add hardly any weight to your rucksack.
    It is made using a Pertex Quantumripstop shell filled with 350g of 700 FP Polish Goose down.
    Trapezoid construction eliminates cold spots enabling a comfortable night’s sleep.
    A DWR+ treatment of the shell helps protect the down from any dampness that may occur in your tent, from condensation or wet gear.
    When in its stuff sack, the pack size of 12 x 12 x 27cm which is absolutely tiny.
    Since it takes up hardly any room you will be able to use a smaller rucksack.
    Colour: Black outer / Crimson inner
    Top Construction: Trapezoid
    Fabric: Pertex Quantum Ripstop Shell, 52g/m²  Made in Japan by Mitsui Bussan Textile Co.
    Insulation: 92:8 Polish Goose Down
    Collected in accordance with Downpass ethical standards
    Fill weight: 350g
    Fill power: 680+
    Tested and certified by the International Down & Feather Testing Laboratory, Salt Lake City
    Comfort temperature rating: -3°C
    Criterion offer a single comfort temperature, which is the temperature limit at which they feel will allow the most comfortable night’s sleep.
    Average weight of sleeping bag: 765g
    Stuff sack size: 12 x 12 x 27cm, weight 16g
    Maximum user height: 185cm, 6'1"
    Length of bag: 217cm
    Shoulder  width: 75cm
    Foot width: 50cm
    Differential fill, 60% of the down is on the top, 40% on the bottom
    Differential Cut, this is a manufacturing technique by which the outer surface of the top side of the sleeping bag is wider than lower (inside) surface.
    This helps the down to expand outwards from the centrally located body position thus facilitating optimum lofting
    Anti-snagging, full length insulated zip baffle
    Full-length YKK two-way zip with zip together compatibility (even different models)
    Cowl hood and 1 hand operated drawcord, 
    Inside pocket & hanging loops
    Box foot - comfortable, trapezium shape, for all feet positions
    Compact fully-featured stuff sack, specially designed for easy, one handed stuffing
    Mesh storage bag
    Criterion Range Temperature Rating
    All of the Criterion models in the table below have been independently tested for warmth by Leeds University Performance Clothing Research Group
    The results for all of the Criterion models were at least as good as stated – and were better in most cases
    To get to their stated temperature ratings the sleeping bags have been tested, to British Standard BS 4745 and ISO 5087-1, by the University of Leeds’ Performance Clothing Research Group.
    These tests gave both a TOG rating which you would be familiar with when buying a bed duvet as well as a specific temp in °C.  
    This is a starting point as laboratory tests are controlled environments, the mannequins do not move or sweat. 
    Through product testing, expeditions and tester feedback Criterion have refined the labratory ratings to the ones advertised for the sleeping bags.
    In cases where they have changed the tested rating  the temperature has been reduced to be more cautionary and safer.
    Sleeping Bag Test result after 24 hours (°C) Advertised Comfort Temperature (°C)
    Quantum 200 0 0
    Quantum 350 -6 -6
    Quantum 450 -12 -10
    Ultralight 200 +3 +3
    Ultralight 350 -6 -3
    Traveller 500 -12 -7
    Traveller 650 -16 -12
    Traveller 750 -20 -16
    Prime 400 -11 -7
    Prime 550 -18 -12
    Prime 700 -22 -18

  • Free UK Delivery On All Orders
    Orders received BEFORE 1pm on days we are open are usually dispatched the same day with Royal Mail using a 2nd Class delivery service (normally 2-3 working days).

    Orders over £30 will be sent Tracked & Signed For.

    Please note that a different delivery method, e.g Courier, may be used depending on the size/weight of your order and if so we will try to inform you before dispatch.

    Next Day UK Delivery  £8.00
    Orders placed BEFORE 1pm on days we are open will be dispatched the same day, usually by Royal Mail or occasionally by Courier and will require a signature. Any Next Day orders received after this time will be dispatched the following working day. Please note any orders placed AFTER 1pm on Fridays will be dispatched on the following Monday (excluding Bank Holidays).

    Highlands of Scotland, UK Islands & Countries outside of the UK
    The above does not apply to these areas
    We do not deliver to countries not in the United Kingdom

    If you would like any more information on your delivery
    please contact us

    As a busy independent retailer, very occassionally we may not have the ordered item in stock. In this case we will inform you of the situation so you can decide how we proceed to your satisfaction. For example, the item may be on order from our supplier, Criterion will send a sleeping bag direct to the customer on our behalf (48 hour Parcel Force delivery).

  • Returns must be made within 14 days of receiving the goods. Please contact us to let us know your intention at or phone 01422 371146
    If you're returning an item because it's unwanted or you need to exchange it, we ask that you pay for the cost of return carriage. Exchanges for non-sale items will be sent free of charge. Standard delivery charges will apply to sale-item / special offer exchanges.
    All unwanted items must be new and unused, and with original labels attached, along with all receipts / proof of purchase. Please ensure the item(s) are packaged securely and suitably for transit

    Return to: 
    After Sales,
    BAC Outdoor Leisure Ltd
    Central Hall,  Coronation Street, Elland, West Yorkshire, HX5 0DF 
    When you're arranging to return an item, we strongly recommend that you use a recorded / insured delivery service as we regret that we cannot be held responsible for goods lost in transit. If return conditions are met we will issue a refund within a maximum of 3 working days of the goods being returned to us
    For Health & Safety reasons we are unable to accept returns of climbing hardware, helmets or baselayer / underwear.