If you are looking for non-bulky shoulder protection to work in conjunction with a hardshell chest protector look no further.
The Shoulder Tee is designed to be used as a moisture wicking base layer but has the benefit of CE Certified slimline soft impact foam in the shoulders that works with or without a Leatt Neck Brace.
Next step up in protection level is the 3DF AirFit Body Tee Lite that has addition impact protection for the chest and back.

3DF AirFit ventilated soft impact foam
CE tested and certified as impact protection: Shoulder EN1621-1
Our 3D design ensures a great fit that is very comfortable
Easy-to-wear compression sock design for maximum evaporation
Antiodor MoistureCool and AirMesh wicking fabrics
Easy to clean: hand wash.
Weight: from 320g (0.71lbs)

Sizing
Unisex fit: S-XXL

S	M	L	XL	XXL
80-90cm	90-100cm	100-110cm	110-120cm	120-130cm
31.5-35.5"	35.5"-39.5"	39.5"-43.5"	43.5"-47"	47"-51"

60% Nylon 25% Polyurethane 10% Polyester 5% Other