Size: Approximately 42 x 32 cm. I believe my mother chose this compact one for her use. Stored at home for several years. Backpack for oxygen tanks. Made by Mizuno and Teijin, a dedicated backpack for medical oxygen tanks. Inside, there's a compartment to hold the oxygen tank in place and prevent it from shifting. Sturdy construction. Cushioning and a waist belt are included to reduce the burden on the back and waist. #ice【】 #ice【】baby #ice【】maternity #ice【】men's #oxygen tank backpack #MIZUNO #TEIJIN Possible shipping options: Rakuraku Mercari or Yu-Yu Mercari. Oxygen tank Home care Medical care Nursing wear Maternity Pre- and post-natal Preparation for childbirth Preparation for hospitalization Loungewear One-mile wear Homewear Home care Telework Commuting School Travel Outdoor Stroll Also, I am selling items from Uniqlo, Global Work, Repsium, Studio Clip, Muji, Disney, Belle Maison, and Shimamura. I offer discounts for combined purchases!! I also sell baby and kids' clothes from brands like Familiar and Mikihouse.