It&;s irritating to get your dozing bag wet with condensation when you hike,People who've traveled lengthy distances have likely experienced drowsing bags that change into less warm thanks to moisture I tried to unravel this problem by way of covering the slumbering bag with a tyvek,Because tyvek is waterproof and breathable,But as a result of tyvek is so light-weight and straightforward to shift, it become inspired by way of the bottomless snoozing bag,Full closure of the foot can larger preserve the foot dozing bag, additionally has the function of positioning,The upper a part of the open design only should be lined at the drowsing bag, no sense of restraint,It is waterproof whereas also has a definite heating effect However, because of the waterproofing estate of tyvek itself and the design constitution of this product, it's not recommended to apply it alone! DESCRIPTION It&;s leading function is to forestall the condensation inside the tent from getting into the drowsing bag, instead of to stop rain and water splashing! FEATURES -Super light -waterproof -Ventilate -Convenient -Every soiled -Heat preservation SPECSWeight:A :135g / 0 / 4 :200g / 0 / 7:A :180cm x 145cm / 70 x 57 :230cm x 90cm / 90 x 35 the size: A / B :16cm x eight / 6 x 3 MATERIALS Color: White Body: TYVEK LIST 1*Tyvek Bivy NOTICE-As the material traits and dimension tips are diversified it may be purely in error with the particular object is usually recommended to apply a mushy fabric dampened with water or detergent for cleaning: This is just an ultra-light sound asleep bag set, now not adding dozing bags! !