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All information based on Grand Exchange price data from: May 20, 2012. Note that the three-day delay in price updates is waived for RuneScoop members.
Crafting
Yak-Hide Armour - Legs
Level 43
General Description: Stitching yak-hide armor legs.
Creation/Revision Date: December 29, 2009
Members Only? Yes
Skill Requirements: Crafting(43)
Quest Requirements: --
Equipment Requirements: Needle
Other Requirements: --
Additional Info: --
Level-Specific Activity Details (P2P)
Level 43-46 (P2P)
Level 47+ (P2P)
Description
Stitching yak-hide armor legs at Castle Wars Bank.
Stitching yak-hide armor legs at Castle Wars Bank using a magpie familiar.
Location
Castle Wars Bank
Castle Wars Bank
Multitasking Suitability
3
3
Level-Specific Requirements
--
--
Activity Parameters (As Evaluated for Skill and Level)
Skills
Crafting(43-46)
Crafting(47+), Summoning(47)
Quests
--
--
Equipment
Needle
Needle
Familiar
--
Magpie
Other
--
--
Input and Output Items and Values
Total Input Value
579,228 gp
582,011 gp
Input Items and Item Values
Cured yak-hide[1,580]
576,700
Thread[316]
2,528
Cured yak-hide[1,580]
576,700
Thread[316]
2,528
Magpie pouch[1.8]
2,782
Total Output Value
222,780 gp
249,625 gp
Output Items and Item Values
Yak-hide armour {legs}[1,580]
222,780
Yak-hide armour {legs}[1,580]
222,780
Magpie foragings[1.8]
26,845
Crafting XP
Crafting XP Total
50,560
50,560
Crafting XP by Item
Yak-hide armour {legs}[1,580]
50,560
Yak-hide armour {legs}[1,580]
50,560
Skill Activity Ratings (Primary Skill)
Skill Activity Speed (SAS, XP/hr)
50,560
50,560
Skill Activity Profitability (SAP, gp/hr)
-356,447
-332,385
Skill Activity Efficiency for 100k gp/hr Opp. Cost (SAE100k)
-9.03
-8.55
Skill Activity Efficiency for 250k gp/hr Opp. Cost (SAE250k)
-11.99
-11.52
Skill Activity Efficiency for 500k gp/hr Opp. Cost (SAE500k)
-16.94
-16.46
Skill Activity Efficiency for 1M gp/hr Opp. Cost (SAE1M)
-26.83
-26.35
Analysis, Discussion and Tips for Success
General Discussion
As part of the quest Fremennik Isles, Jagex introduced a new, parallel form of leatherwork to the Crafting skill. Yaks are cow-like creatures that drop yak-hide, which can be cured into cured yak-hide and used to make two types of yak-hide armor: bodies and legs (chaps). These are made in very much the same way as regular leather armor, the only real difference being the raw material and the items made (and getting five items per spool of thread with yak-hide instead of four with leather, for reasons that are a mystery to me...)
Weirdly, Jagex made yak-hide legs and bodies give the same amount of XP, despite the fact that bodies require twice as many hides. For this reason, most players who use yak-hide for training make legs.
Note that in the game itself, both the legs and bodies are just called "Yak-hide armour".
Location and Access
You can craft yak-hide armor at any bank, but a one-click bank is preferred. Castle Wars is my favorite.
Required and Recommended Equipment
A needle.
Required and Recommended Supplies
You need one piece of cured yak-hide per item made, and roughly one spool of thread for every five items. (Thread is cheap, so I recommend just buying lots of it so you don't worry about running out.)
Cured yak-hide can be purchased, or you can get it cured yourself at the special tanner on the island of Neitiznot. Beware that getting large amounts of yak-hide can be difficult at times, because these items are used as the secondary ingredient for the popular pack yak familiar.
Familiar Suggestions
Summon a foraging familiar to earn extra money for you while you work -- I prefer the magpie, given the high value of rings and gems today. There isn't a really worthwhile forager below Summoning level 47, so I wouldn't bother with a familiar at lower levels.
Technique and Tips
With a needle and thread in your inventory, withdraw a full load of cured yak-hide. Click the needle and then one of the pieces of yak-hide; when the dialog box comes up, right-click the "Yak hide leg armour" entry and choose "Make X". Quickly enter any number over 26 (I usually just reach for the number keys and enter "33" or "44" or something like that) and wait for the items to be made. When they are done, bank them and repeat the procedure.
All information based on Grand Exchange price data from: May 20, 2012. Note that the three-day delay in price updates is waived for RuneScoop members.
All information based on Grand Exchange price data from: May 20, 2012. Note that the three-day delay in price updates is waived for RuneScoop members. 
