... game. By the way, material pvc and tpu has not much difference from the eyes, but from their ... differences:1, tpu won't fade out2, tpu has wider hardness range shore A 60-shore D 853, ... rebound resistance;4, tpu is Environmental protecting 5, tpu has no pungent smellUsage steps: Inflating:1. Tie the ... .Deflating:Just zip the zipper.Warning: 1. Those who have heart diseases or the hypertension, as well as ...