EXHIBIT 99.1 [Letterhead of Frost & Sullivan] March 20, 2001 dj Orthopedics, Inc. 2985 Scott Street Vista, California 92083 Re: Annual Report Form 10-K of dj Orthopedics, Inc. (SEC Reg. No. 333-86358) Ladies and Gentlemen: We hereby consent to the use in the above-referenced annual report of our name and the market share and other information contained in our report entitled "Custom Project for dj Orthopedics - Orthopedics Bracing and Soft Goods Market". We also consent to the filing of this letter as an exhibit to the above-referenced annual report. Very truly yours, Frost & Sullivan By: /s/ Dorman Followwill Name: Dorman Followwill Title: VP - Healthcare