The adjustable harness 1204 may be similar to the harness 1103 of FIG. 11A, and may use similar materials and have similar structural components, including, for example, rigid or non-rigid members that cause the adjustable harness 1204 to be worn in relatively similar positions on the user's forearm 1202 each time it is fitted to the user's forearm 1202. However, the adjustable components of the adjustable harness 1204 may allow for a more fine-grained adjustment of the fitment of the adjustable harness 1204 against the user's forearm. In particular, in one embodiment, the adjustable harness 1204 includes an adjustment mechanism (not shown) at the location of each sensor 1206. This adjustment mechanism allows for adjustment of the haptic output exerted by the adjustable harness 1204 against the user's forearm at the location of the sensors 1206 by adjusting the circumference of the adjustable harness 1204, or via some other means. Furthermore, the adjustment mechanism may have various markings to indicate the level of adjustment that has occurred. For example, form of markings that indicate a dimension of the adjustable harness 1204 (e.g., a circumference of the adjustable harness 1204) at a particular level of adjustment may be provided. An adjustment mechanism may have marking indicating the total circumference of the adjustable harness 1204 at each level of adjustment. The adjustment mechanism may be an adjustable strap (which may be elastic or non-elastic), a hook and loop fastener combination (e.g., Velcro?), a retractable strap, a ratcheting strap or buckle, and so on.
