It's been said many times, that most camera straps from camera manufacturers
do a better job of advertising their brand name, then actually being a good camera strap.

For comfort, durable utility and's hard to beat an 'OP/Tech' strap.

OP/Tech, Classic Strap, (adequate for your Mat-G):

OP/Tech, Pro Strap, for heavier/heaviest of cameras:

B&H Photo's 'Camera Strap' pages: