Got measured up for a set of 4SR air bag ready leathers at the bike show last year, being custom-made was able to choose design and colours, 4SR have designed the suit to work with the alpinestar tech air vest so it all zips in and fit as it would in a set of alpinestar leathers, they are also able to supply the LEDs and lead for the alpinestar tech air vest.
Very happy with the quality and the protection built into the leathers, the fit is good but need a bit more time to break them in (have only used them a couple of times) 4SR where a pleasure to deal with and nothing was too much trouble for them and kept me up to date with what was going on.
Also got an alpinestar tech air race vest to go with them, chose the alpinestar vest as I thought it had the best air bag coverage and went for the race version as you can swap between road and track with it but you can't with the street version.
Will try and add some pictures when I figured out how
