Once upon a time various books and a quest were required to train to the next level in first aid. Nowadays you can get all the skills from your trainer. Buy or farm a ton of cloth and max this skill out. Use the excess to level your Tailoring skills, or visa versa.
Heck, Healers can use this skill to troll other players. 
| Skill | Item to be created | Materials for one item |
|
1-75, Apprentice 1st Aid, Requires level 1, train up at skill 50+ |
||
| 1-40 | Linen Bandage | Linen Cloth |
| 40-75 | Heavy Linen Bandage | 2x Linen Cloth |
|
76-150, Journeyman 1st Aid, Requires level 1, train up at skill 125+ |
||
| 76-80 | Heavy Linen Bandage | 2x Linen Cloth |
| 80-115 | Wool Bandage | Wool Cloth |
| 115-150 | Heavy Wool Bandage | 2x Wool Cloth |
|
151-225, Expert 1st Aid, Requires level 1, train up at skill 200+ |
||
| 150-180 | Silk Bandage | Silk Cloth |
| 180-210 | Heavy Silk Bandage | 2x Silk Cloth |
| 210-225 | Mageweave Bandage | Mageweave Cloth |
|
226-300, Artisan 1st Aid, Requires level 35, train up at skill 275+ |
||
| 226-240 | Mageweave Bandage | Mageweave Cloth |
| 240-260 | Heavy Mageweave Bandage | 2x Mageweave Cloth |
| 260-290 | Runecloth Bandage | Runecloth |
| 290-300 | Heavy Runecloth Bandage | 2x Runecloth |
|
301-375, Master 1st Aid, Requires level 50, train up at skill 350+ |
||
| 301-340 | Netherweave Bandage | Netherweave cloth |
| 340-367 | Heavy Netherweave Bandage | 2x Netherweave Cloth |
| 367-375 | Frostweave Bandage | Frostweave Cloth |
|
376, GrandMaster 1st Aid, Requires level 65, train up at skill 425+ |
||
| 376-400 | Frostweave Bandage | Frostweave Cloth |
| 400-425 | Heavy Frostweave Bandage | 2x Frostweave Cloth |
| 425-450 | Embersilk Bandage | Embersilk Cloth |
|
451, Illustrious GrandMaster 1st Aid, Requires level 75 |
||
| 451-475 | Embersilk Bandage | Embersilk Cloth |
| 475-525 | Heavy Embersilk Bandage | 2x Embersilk Cloth |
