General Safety advise as listed by manufacture:
Don't use the band in any way that it may snap towards the head face or eyes.
Inspect the band before each use for signs of damage or wear.
Remove all jewellery to prevent damage to band or catching.
If the exercise involves standing or winding band around foot check shoes for stones first to prevent damage.
Do not over stretch band.
If using in pools wash immediately after use.
Children should not be left unsupervised while using this product.
It is also recommended by the manufacture to wear eye protection as old, warn and over stretched bands can snap without warning