1、Made of high grade materials, good sealing performance, explosion-proof, durable and not easy to damage. 2、Quick inflate or deflate after using for quick storage. Giving you a convenient using experience. 3、It adopt 4.5cm TPU one-way explosion-proof valve, which will automatically seal after inflation. 4、There is reflective strip on both side, easily draw people's attention and allow them to find your position quickly. 5、There are 316 stainless steel D ring on the top and bottom, which are easy to attach it on your pocket or clip. Description The function of surface marker buoy is to let ships and people at sea know that the diver is underwater and about to come up. Features: 1. Made of high grade materials, good sealing performance, explosion-proof, durable and not easy to damage. 2. Quick inflate or deflate after using for quick storage. Giving you a convenient using experience. 3. It adopt 4.5cm TPU one-way explosion-proof valve, which will automatically seal after inflation. 4. There is reflective strip on both side, easily draw people's attention and allow them to find your position quickly. 5. There are 316 stainless steel D ring on the top and bottom, which are easy to attach it on your pocket or clip. 6. It ensures extra safety while diving, really an indispensable accessory for diver location marker. Specification: Material: 210D Nylon Cloth + Waterproof TPU Coating Size: Approx. 122*19cm/4*0.62ft Packing List: 1 * Surface Marker Buoy