MY BAG: Jason Day

"I've picked up 3 mph in ball speed with my new M1 driver. That's probably another 10 yards. I'm O.K. with another 10 yards."

DRIVER

TaylorMade M1 (10.5°)

taylormadegolf.com

Shaft: Mitsubishi Rayon

Kuro Kage Silver TiNi 70x

mitsubishirayongolf.com

FAIRWAY WOOD

TaylorMade

AeroBurner 3HL (16.5° plays to 14.5°)

Shaft: Mitsubishi Rayon

Kuro Kage Silver TiNi 80x

IRONS*

TaylorMade

RSi TP (3-PW)

Shaft: True Temper

Dynamic Gold X7

truetemper.com

WEDGES

TaylorMade

Tour Preferred EF (47°, 52°, 60°)

Shaft: True Temper

Dynamic Gold S400

PUTTER

TaylorMade

Ghost Spider Itsy Bitsy Black Prototype

BALL

TaylorMade

Tour Preferred X

GRIPS

Golf Pride

Tour Velvet Cord

golfpride.com

*Day swaps the RSi TP 3-iron for an RSi2 2-iron at some events.

TECH TALK

We Have Liftoff

Cobra King LTD driver

Cobra's R-and-D team partnered with the Center for the Advancement of Science in Space (CASIS), a government-run laboratory, to conduct research on the International Space Station. Insights on specific materials and constructions were then applied to the King LTD driver. The final product is packed with a carbon-fiber crown, a multithickness clubface, an adjustable hosel and a removable 16-gram aluminum-and-polycarbonate disk in the sole. Company officials say the club has the lowest center of gravity of any driver on the market plus a high MOI for added forgiveness on off-center shots. Testing shows that the King LTD generates faster ball speeds, higher-launching shots with less spin, and longer drives than competitors' models. $450; available on Nov. 13.

INSIDE STORY

A window in the sole, which resembles the International Space Station's observatory module, offers a cool view into the clubhead.

PHOTO

ANGUS MURRAY (BAG)

PHOTO

CARLOS M. SAAVEDRA FOR SPORTS ILLUSTRATED (DAY)

PHOTO

JESSE REITER (BALL)

PHOTO

COURTESY OF COBRA (CLUB)