Nope, the miserable cloud.
A hoodie, for those days that are just, well, Nope. 
 
Size guide - How to measure, displayed in Photo Gallery
 
I would suggest going up at least one size higher than what you would normally choose in clothing. Eg. if you are normally a small, get at least a medium.
 
S - Width 20 inch, Length 27 inch, Sleeve 33inch
M- Width 22inch, Length 28inch, Sleeve 34inch
L- Width 24inch, Length 29inch, Sleeve 35inch
XL- Width 26inch, Length 30inch, Sleeve 36inch
2X - Width 28 inch, Length 31 inch, Sleeve 37 inch
3X - Width 30 inch, Length 32 inch, Sleeve 38 inch
4X - Width 32 inch, Length 33 inch
5X- Width 34 inch, Length 34 inch
 
• 50% pre-shrunk cotton, 50% polyester
• Fabric weight: 8.0 oz/yd² (271.25 g/m²)
• Air-jet spun yarn with a soft feel and reduced pilling
• Double-lined hood with matching drawcord
• Quarter-turned body to avoid crease down the middle
• 1 × 1 athletic rib-knit cuffs and waistband with spandex
• Front pouch pocket
• Double-needle stitched collar, shoulders, armholes, cuffs, and hem