SOLAS tape will help you to be seen when you most need it. We have done inshore rescue practice testing with the RNLI in N. Wales. The RNLI's spot lights picked up the paddlers flash from this 3M SOLAS tape. The higher it is on you the better.
Tape pieces can be stuck on the back of your helmet, back of paddles or on your boat. But recommend if sticking on your kayak put below the seam line, as if placed above on the top deck you will get flashed and kill your night vision.
Sold as a 4 pack for $7.00
SOLAS. 3M Reflective Tape. 4 Pack