BOSS puts its iconic stamp on the classic pilot s watch with the Skytraveller, a sporty and sophisticated chronograph with date function. Available in: A 44mm stainless steel case, black dial with brown leather strap. Water resistant to 5 ATM. A 44mm stainless steel case, blue dial with mesh bracelet. Water resistant to 5 ATM. A 44mm grey IP case, grey dial with grey IP bracelet. Water resistant to 5 ATM..