Fits officially 27 x 2.6" tyres (unofficially many people are running 2.8")
1.5" tapered steerer.
15 x 110 mm Boost front axle with single tool removal (6 mm hex key)
180 mm post mount brake fitting
MC^2 damper with adjustable HSC, LSC & LSR
Externally adjustable hydraulic bottom out
IRT dual positive chamber air spring with self balancing negative
Bolt on front and rear facing mud-guard (photo is 2018 version).
Stealth stickers included in box.
Updates From 2018:
Stronger crown with thicker wall steerer and stanchions to prevent noise.
New fender (mud guard) which extends forwards under the arch
170mm travel (no cost internal configuration).
Travel reduction (requires purchase of spacers).
High flow damper piston for better rock eating performance.
Shockcraft Hot Ois for better high temp and cold weather use.
Check out NZMTBR's review of the Mattoc Pro Boost.