(This listing is for an item which is "Presale" and may take longer to ship.)
Speaking from experience, it's great to be able to tuck a Merlin under your arm, but it's even better (and easier) when you can let a strap take some of the weight.
And allow yourself more balance to move freely and play better!
It's a must-have accessory.
NOTE: This stap is specifically made by Seagull for their Merlin M4 model, but would work well for any instrument with a single strap button.