3-layer seal and 1 Velcro seal -- Improved safety for waterproofing. Protect your items from dirt, dust, grease and scratches. Note: It is best to test with paper underwater before putting your valuables in the case, and be sure to close the three zippers and fold the creases correctly. Adjustable belt between 81 cm and 114 cm -- The adjustable strap on the waterproof bag provides a good fit for most adult body shapes. You can wear it around your waist or over your shoulder, it is convenient for you to take it everywhere. Touch screen -- Soft PVC material that allows you to use the touch screen of your smartphone without having to open the pocket, to check emails, messages. 2-pack Large Capacity - 21.5 cm * 15.7 cm. You can put all your small items such as to protect various items such as camera, paper, phone, money, tissues, keys, watch, documents, ID card etc in the pocket. Multi-purpose waterproof bag -- keep your valuables safe when you go to the beach: surfing, rafting, kayaking, snorkeling, sailing, boating, swimming or camping, hiking, fishing on foot, suitable for water activities.