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Instead of the stiff, hard to put on rubber strap, it would be nice to have a Velcro cinch strap like Apple Watch bands, etc. It would be softer, more secure, and much easier to put on, especially one-handed.
We actually offer such a strap for the Core - it's called the body strap and it's made from a very similar mateiral as the Apple Watch bands! I realize this may not be helpful since you have the Pulse, but just wanted to mention it. Thanks for the suggestion!