The ultralight compression dry bag is also available with valve for maximum compression. It is particularly suited for compressing sleeping bags. Available in three sizes.Further features of the models: Buckles Robust fabric at base: abrasion and tear resistant Broad base loop for easy unpacking and fixingAdvice:Closure of compression dry bags must be rolled at least 5-6 times. Please add 15-20 cm/5-8 in. for the total length.